From BF-46527.

The basic test setup is to run simple aggregation pipelines against a truncated oplog with $_requestReshardingResumeToken set to true (expect failure) and set to false (expect success).

The problem is that a transient CappedPositionLost may occur if truncation occurs during the aggregation and can safely be retried without changing the character of the test.

This task is to add that retry and verify the test still works as expected.